431321179493 has 2 divisors, whose sum is σ = 431321179494. Its totient is φ = 431321179492.

The previous prime is 431321179489. The next prime is 431321179519. The reversal of 431321179493 is 394971123134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244172363044 + 187148816449 = 494138^2 + 432607^2 .

It is a cyclic number.

It is not a de Polignac number, because 431321179493 - 2² = 431321179489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431321179403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215660589746 + 215660589747.

It is an arithmetic number, because the mean of its divisors is an integer number (215660589747).

Almost surely, 2^431321179493 is an apocalyptic number.

It is an amenable number.

431321179493 is a deficient number, since it is larger than the sum of its proper divisors (1).

431321179493 is an equidigital number, since it uses as much as digits as its factorization.

431321179493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The spelling of 431321179493 in words is "four hundred thirty-one billion, three hundred twenty-one million, one hundred seventy-nine thousand, four hundred ninety-three".